Unformatted text preview: 4. Briefly outline Walter Garstang's theory of paedomorphosis for the origin of the vertebrates. 5. How might the morphology of larvaceans shed light on the evolution of the vertebrates? 6. Describe how food is captured in a sessile tunicate. 7. What substance made by the body is often associated with filter–feeding? (Think of bivalves, larvaceans, tunicates, and some brittle stars. ) 8. List 2 phyla in which some members have a calcareous endo skeleton. 1...
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- Fall '09
- Tunicate, pharyngeal gill slits